CN111535157A - High pier capable of reducing hydration heat of mass concrete and construction method thereof - Google Patents
High pier capable of reducing hydration heat of mass concrete and construction method thereof Download PDFInfo
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- CN111535157A CN111535157A CN202010390082.0A CN202010390082A CN111535157A CN 111535157 A CN111535157 A CN 111535157A CN 202010390082 A CN202010390082 A CN 202010390082A CN 111535157 A CN111535157 A CN 111535157A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention relates to the technical field of bridge engineering, and particularly discloses a high pier capable of reducing hydration heat of mass concrete and a construction method thereof, wherein the high pier comprises a vertical steel bar framework, a plurality of horizontal steel bar layers and a cooling unit, the cooling unit comprises a connecting device, a plurality of horizontal cooling layers, a vertical water pipe and a partition plate, and the horizontal cooling layers comprise threaded steel pipes; a plurality of groups of communication nodes are vertically arranged on the vertical water service pipe, each communication node comprises a water inlet and a water outlet, the water inlets are positioned below the water outlets, and the water inlets and the water outlets are respectively communicated with two ends of the threaded steel pipes; vertical fixed being equipped with a plurality of gag lever posts in the vertical water service pipe, being equipped with spacing hole on the baffle, gag lever post and spacing hole sliding seal contact, the inner wall sliding seal contact of baffle and vertical water service pipe, the vertical board that is equipped with the curved surface shape on the baffle is equipped with a plurality of first fixed orificess on the vertical board, and the bottom of vertical board is equipped with the discharge orifice. The invention aims to solve the problem that heat in concrete is accumulated and cannot be dissipated.
Description
Technical Field
The invention relates to the technical field of bridge engineering, and particularly discloses a high pier capable of reducing hydration heat of mass concrete and a construction method thereof.
Background
With the development of science and technology, bridges such as large-span overpasses and river crossings are continuously presented, the height of the bridge pier is continuously increased, and the large-volume concrete gradually becomes an important component for constructing the bridge pier. But due to some defects of the existing construction, cracks and other thermal shrinkage crack diseases occur on the bridge pier, and the quality of the bridge is seriously influenced. The causes of cracks can be divided into two categories: one is structural cracking, typically caused by external loading; the second is material type cracking, which is generally caused by temperature stress and shrinkage of concrete. In the process of pouring construction and later-stage maintenance of large-volume concrete, cement hydration reaction releases a large amount of heat, namely hydration heat, so that a large amount of heat accumulated in the concrete cannot be dissipated, and finally the concrete shrinks and cracks appear. Therefore, the hydration heat needs to be reduced in the concrete pouring construction process, so that the heat accumulated by the concrete is dissipated, and the concrete is prevented from cracking.
Disclosure of Invention
The invention aims to provide a high pier capable of reducing hydration heat of mass concrete and a construction method thereof, so as to solve the problem that heat in the concrete is accumulated and cannot be dissipated.
In order to achieve the purpose, the basic scheme of the invention is as follows:
the high pier capable of reducing the hydration heat of the large-volume concrete comprises a vertical steel bar framework, a plurality of horizontal steel bar layers and a cooling unit, wherein the cooling unit comprises a connecting device, a plurality of horizontal cooling layers, a vertical water through pipe and a partition plate, one end of the connecting device is connected with the horizontal steel bar layers, the other end of the connecting device is connected with the horizontal cooling layers, each horizontal cooling layer comprises a spirally-bent threaded steel pipe, and the horizontal cooling layers are integrally circular and downwards incline towards the direction of the vertical water through pipe; the vertical water service pipe is vertically provided with a plurality of groups of communication nodes, each communication node comprises a water inlet and a water outlet, the water inlets are positioned below the water outlets, and the water inlets and the water outlets are respectively communicated with two ends of the threaded steel pipe; vertical fixed a plurality of gag lever posts that are equipped with in the vertical water service pipe, be equipped with spacing hole on the baffle, gag lever post and spacing hole sliding seal contact, the inner wall sliding seal contact of baffle and vertical water service pipe, the vertical board that is equipped with the curved surface shape on the baffle is equipped with a plurality of first fixed orificess on the vertical board, the upper portion of vertical water service pipe is equipped with can be with the second fixed orifices that first fixed orifices is aligned, first fixed orifices is crisscross with water inlet and delivery port, the bottom of vertical board is equipped with the discharge orifice, and the discharge orifice can align with the water inlet.
Optionally, the connecting device comprises two fixing rings and a fixing rod; among a plurality of connecting device, the length of fixed link is different, and two solid fixed rings are the upper and lower distribution, and solid fixed ring includes two semi-annular fixed hoops, and two fixed hoops pass through bolt fixed connection, the lower extreme of dead lever and the solid fixed ring fixed connection of below, the upper end of dead lever is rotated and is equipped with and rotates the seat, rotates the seat and is connected with the solid fixed ring of top, the top gu fixed ring is connected with the horizontal cooling layer, the solid fixed ring of below is connected with the horizontal reinforcement layer.
Optionally, the bottom of the vertical water pipe is communicated with a water outlet pipe, and the water outlet pipe is L-shaped.
Optionally, a water suction pipe made of a metal hose is placed in the water outlet pipe, and a water suction pump is communicated with the upper end of the water suction pipe.
The construction method of the high pier capable of reducing the hydration heat of the mass concrete comprises the following steps:
s1, vertically fixing the vertical water through pipe on the vertical steel bar framework and the horizontal steel bar layer;
s2, mounting the fixing rings below the connecting devices on the horizontal reinforcing steel bar layers every other multiple horizontal reinforcing steel bar layers, wherein the connecting devices are enclosed into multiple circles of concentric circles, the length of the fixing rods in the connecting devices closer to the vertical water pipe is smaller, and the lengths of the fixing rods in the connecting devices on the same circle are the same; fixing the horizontal cooling layer in a fixing ring above the connecting device;
s3, hermetically communicating two ends of the threaded steel pipe in the horizontal cooling layer with a water inlet and a water outlet of the vertical water through pipe respectively;
s4, after the horizontal reinforcing steel bar layer and the horizontal cooling layer are built, aligning a limiting hole in the partition plate with a limiting rod of the vertical water service pipe, then sliding the partition plate into the bottom of the vertical water service pipe to enable a first fixing hole in the vertical plate to be aligned with a second fixing hole of the vertical water service pipe, inserting a bolt into the first fixing hole and the second fixing hole to fix the partition plate and the vertical plate on the vertical water service pipe, and at the moment, separating a water outlet and a water inlet at the lowest part by the partition plate;
s5, pouring concrete, introducing cooling water into the vertical water through pipe, enabling the cooling water to flow into the lowest water inlet, then flowing to the horizontal cooling layer from the water inlet, cooling the nearby concrete, and then flowing out from the water outlet; along with the gradual increase of concrete, the bolts are detached, the vertical plates are pulled out upwards, the vertical plates are fixed by the bolts, the position of the partition plate moves upwards for a certain distance, the water outlets and the water inlets of the upper group of communication nodes are separated, and cooling water is continuously introduced into the vertical water service pipes;
s6, after the concrete pouring is finished, the vertical plates and the partition plates are completely pulled out, and cooling water is continuously introduced into the vertical water through pipes until the cooling is finished;
and S7, completely pumping out the cooling water in the vertical water service pipe and the water outlet pipe, and then pouring cement mortar into the water service pipe and the water outlet pipe until the water service pipe and the water outlet pipe are molded.
The working principle and the beneficial effects of the scheme are as follows:
1. the horizontal cooling layer in the scheme is fixed on the horizontal reinforcing steel bar layer, and the structure of the horizontal reinforcing steel bar layer is basically not influenced; and its slope sets up, and after the cooling was accomplished, hydroenergy in the horizontal cooling layer can be gone out by oneself, and follow-up when pouring into cement mortar in to vertical water pipe, cement mortar just can fill in the horizontal cooling layer, guarantees the structural strength on vertical water pipe and horizontal cooling layer.
2. In this scheme, suppose that the baffle separates the delivery port and the water inlet of below UNICOM node, when cooling water got into vertical water service pipe, because the water inlet and the delivery port of all the other UNICOM nodes all with vertical water service pipe UNICOM, so water only can fill the horizontal cooling layer of top fully, and water mobility wherein is then relatively poor. Most of water flows directly flow to the lowest water inlet and then flow out of the lowest water outlet, so that the water in the lowest horizontal cooling layer flows at a high speed, and the concrete can be quickly subjected to heat exchange and cooled; when concrete continues to be poured, the height of the concrete is higher and higher, the partition plate is moved upwards, and similarly, water in the corresponding horizontal cooling layer flows fast, so that the concrete of the part is cooled fast. The targeted quick cooling has been realized in this scheme for the cooling rate of local concrete, simultaneously, because the cooling water is full of in all horizontal cooling layers all the time, so near concrete in all the other horizontal cooling layers can both obtain effective heat transfer cooling and handle.
Drawings
FIG. 1 is a schematic structural diagram of the present embodiment;
FIG. 2 is a schematic view showing a top part of the vertical water pipe in FIG. 1
FIG. 3 is a schematic structural view of a horizontal cooling layer, a vertical water pipe and a water outlet pipe;
FIG. 4 is a longitudinal sectional view of a vertical water pipe;
FIG. 5 is a schematic view of the structure of the connecting device;
fig. 6 is a schematic structural view of the fixing rod and the fixing ring.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the water pipe comprises a vertical steel bar framework 1, a horizontal steel bar layer 2, a vertical water through pipe 3, a water outlet pipe 4, a limiting rod 5, a vertical plate 6, a first fixing hole 7, a second fixing hole 8, a water inlet 9, a water outlet 10, a threaded steel pipe 11, a bolt 12, a partition plate 13, a fixing hoop 14, an extension plate 15, a bolt 16 and a fixing rod 17.
This embodiment is substantially as shown in fig. 1:
a high pier capable of reducing hydration heat of mass concrete comprises a vertical steel reinforcement framework 1, a plurality of horizontal steel reinforcement layers 2 and a cooling unit.
Referring to fig. 4, 5 and 6, the cooling unit includes a connection device, a plurality of horizontal cooling layers, a vertical water service pipe 3 and a partition plate 13. The connecting device comprises two fixing rings and a fixing rod 17; in the connecting devices, the length of the fixing rod 17 is different, and the two fixing rings are distributed up and down. The fixed ring comprises two semi-annular fixed hoops 14, two sides of the two fixed hoops 14 are respectively integrally formed with an extension plate 15 extending outwards, threaded holes are formed in the extension plates 15, and the bolts 16 are screwed into the threaded holes and then fixed by nuts to ensure that the two fixed hoops 14 surround the circular fixed ring. The lower extreme of dead lever 17 and the solid fixed ring fixed connection of below, the upper end of dead lever 17 rotates and is equipped with the rotation seat, rotates the rotation direction of seat along solid fixed ring's circumference, rotates the solid fixed ring fixed connection of seat and top. The upper fixing ring is connected with the horizontal cooling layer, and the lower fixing ring is connected with the horizontal reinforcing steel layer 2.
Referring to fig. 2 and 3, the horizontal cooling layer includes a spiral-shaped threaded steel pipe 11, and the horizontal cooling layer is circular as a whole and inclined downward in the direction of the vertical water pipe 3. The vertical water service pipe 3 is vertically provided with a plurality of groups of communication nodes, each communication node comprises a water inlet 9 and a water outlet 10, the water inlets 9 are located below the water outlets 10, and the water inlets 9 and the water outlets 10 are respectively communicated with two ends of the threaded steel pipes 11. Vertical fixed being equipped with a plurality of gag lever posts 5 in vertical water service pipe 3, being equipped with spacing hole on the baffle 13, gag lever post 5 and spacing hole sliding seal contact, baffle 13 and vertical water service pipe 3's inner wall sliding seal contact, the vertical fixed vertical board 6 that is equipped with the curved surface shape on the baffle 13, vertical board 6 and vertical water service pipe 3's inner wall laminating. The vertical plate 6 is provided with a plurality of first fixing holes 7, the upper part of the vertical water service pipe 3 is provided with a second fixing hole 8 which can be aligned with the first fixing holes 7, and the first fixing holes 7 are staggered with the water inlet 9 and the water outlet 10. The bottom of the vertical plate 6 is provided with a water flow hole which can be aligned with the water inlet 9. The bottom of the vertical water pipe 3 is communicated with a water outlet pipe 4, and the water outlet pipe 4 is L-shaped. A water suction pipe made of a metal hose is arranged in the water outlet pipe 4, and the upper end of the water suction pipe is communicated with a water suction pump.
The construction method of the high pier capable of reducing the hydration heat of the mass concrete comprises the following steps:
s1, vertically fixing the vertical water through pipe 3 on the vertical steel bar framework 1 and the horizontal steel bar layer 2;
s2, mounting the fixing rings below the connecting devices on the horizontal reinforcing steel bar layers 2 every other horizontal reinforcing steel bar layers 2, wherein the connecting devices enclose a plurality of circles of concentric circles, the length of the fixing rods 17 in the connecting devices is smaller when the connecting devices are closer to the vertical water service pipe 3, and the lengths of the fixing rods 17 in the connecting devices on the same circle are the same; fixing the horizontal cooling layer in a fixing ring above the connecting device;
s3, hermetically communicating two ends of the threaded steel pipe 11 in the horizontal cooling layer with a water inlet 9 and a water outlet 10 of the vertical water service pipe 3 respectively;
s4, after the horizontal reinforcing steel bar layer 2 and the horizontal cooling layer are built, aligning a limiting hole in a partition plate 13 with a limiting rod 5 of a vertical water service pipe 3, then sliding the partition plate 13 to the bottom of the vertical water service pipe 3 to enable a first fixing hole 7 in a vertical plate 6 to be aligned with a second fixing hole 8 of the vertical water service pipe 3, inserting a bolt 12 into the first fixing hole 7 and the second fixing hole 8 to fix the partition plate 13 and the vertical plate 6 on the vertical water service pipe 3, and then separating a water outlet 10 and a water inlet 9 at the lowest part by the partition plate 13;
s5, pouring concrete, introducing cooling water into the vertical water through pipe 3, enabling the cooling water to flow into the lowest water inlet 9, then flowing to the horizontal cooling layer from the water inlet 9, cooling the nearby concrete, and then flowing out from the water outlet 10; with the gradual increase of concrete, detaching the bolts 12, pulling out the vertical plates 6 upwards, fixing the vertical plates 6 by the bolts 12, moving the partition plates 13 upwards for a certain distance, separating the water outlets 10 and 9 of the previous group of communication nodes, and continuously introducing cooling water into the vertical water service pipes 3;
s6, after concrete pouring is completed, the vertical plates 6 and the partition plates 13 are completely pulled out, and cooling water is continuously introduced into the vertical water through pipes 3 until cooling is completed;
and S7, completely pumping out the cooling water in the vertical water service pipe 3 and the water outlet pipe 4, and then pouring cement mortar into the water service pipe until the water service pipe is molded.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.
Claims (5)
1. Can reduce high mound of bulky concrete hydration heat, its characterized in that: the cooling unit comprises a connecting device, a plurality of horizontal reinforcing steel bar layers, a vertical water service pipe and a partition plate, one end of the connecting device is connected with the horizontal reinforcing steel bar layers, the other end of the connecting device is connected with the horizontal cooling layer, the horizontal cooling layer comprises a spirally-bent threaded steel pipe, and the horizontal cooling layer is integrally circular and inclines downwards towards the direction of the vertical water service pipe; the vertical water service pipe is vertically provided with a plurality of groups of communication nodes, each communication node comprises a water inlet and a water outlet, the water inlets are positioned below the water outlets, and the water inlets and the water outlets are respectively communicated with two ends of the threaded steel pipe; vertical fixed a plurality of gag lever posts that are equipped with in the vertical water service pipe, be equipped with spacing hole on the baffle, gag lever post and spacing hole sliding seal contact, the inner wall sliding seal contact of baffle and vertical water service pipe, the vertical board that is equipped with the curved surface shape on the baffle is equipped with a plurality of first fixed orificess on the vertical board, the upper portion of vertical water service pipe is equipped with can be with the second fixed orifices that first fixed orifices is aligned, first fixed orifices is crisscross with water inlet and delivery port, the bottom of vertical board is equipped with the discharge orifice, and the discharge orifice can align with the water inlet.
2. The high pier capable of reducing the hydration heat of the mass concrete and the construction method thereof according to claim 1, wherein: the connecting device comprises two fixing rings and a fixing rod; among a plurality of connecting device, the length of fixed link is different, and two solid fixed rings are the upper and lower distribution, and solid fixed ring includes two semi-annular fixed hoops, and two fixed hoops pass through bolt fixed connection, the lower extreme of dead lever and the solid fixed ring fixed connection of below, the upper end of dead lever is rotated and is equipped with and rotates the seat, rotates the seat and is connected with the solid fixed ring of top, the top gu fixed ring is connected with the horizontal cooling layer, the solid fixed ring of below is connected with the horizontal reinforcement layer.
3. The high pier capable of reducing the hydration heat of the mass concrete and the construction method thereof according to claim 2, wherein: the bottom of the vertical water pipe is communicated with a water outlet pipe, and the water outlet pipe is L-shaped.
4. The high pier capable of reducing the hydration heat of the mass concrete and the construction method thereof according to claim 3, wherein: a water suction pipe made of a metal hose is arranged in the water outlet pipe, and the upper end of the water suction pipe is communicated with a water suction pump.
5. The construction method of the high pier capable of reducing the hydration heat of the mass concrete according to claim 4, wherein the method comprises the following steps:
s1, vertically fixing the vertical water through pipe on the vertical steel bar framework and the horizontal steel bar layer;
s2, mounting the fixing rings below the connecting devices on the horizontal reinforcing steel bar layers every other multiple horizontal reinforcing steel bar layers, wherein the connecting devices are enclosed into multiple circles of concentric circles, the length of the fixing rods in the connecting devices closer to the vertical water pipe is smaller, and the lengths of the fixing rods in the connecting devices on the same circle are the same; fixing the horizontal cooling layer in a fixing ring above the connecting device;
s3, hermetically communicating two ends of the threaded steel pipe in the horizontal cooling layer with a water inlet and a water outlet of the vertical water through pipe respectively;
s4, after the horizontal reinforcing steel bar layer and the horizontal cooling layer are built, aligning a limiting hole in the partition plate with a limiting rod of the vertical water service pipe, then sliding the partition plate into the bottom of the vertical water service pipe to enable a first fixing hole in the vertical plate to be aligned with a second fixing hole of the vertical water service pipe, inserting a bolt into the first fixing hole and the second fixing hole to fix the partition plate and the vertical plate on the vertical water service pipe, and at the moment, separating a water outlet and a water inlet at the lowest part by the partition plate;
s5, pouring concrete, introducing cooling water into the vertical water through pipe, enabling the cooling water to flow into the lowest water inlet, then flowing to the horizontal cooling layer from the water inlet, cooling the nearby concrete, and then flowing out from the water outlet; along with the gradual increase of concrete, the bolts are detached, the vertical plates are pulled out upwards, the vertical plates are fixed by the bolts, the position of the partition plate moves upwards for a certain distance, the water outlets and the water inlets of the upper group of communication nodes are separated, and cooling water is continuously introduced into the vertical water service pipes;
s6, after the concrete pouring is finished, the vertical plates and the partition plates are completely pulled out, and cooling water is continuously introduced into the vertical water through pipes until the cooling is finished;
and S7, completely pumping out the cooling water in the vertical water service pipe and the water outlet pipe, and then pouring cement mortar into the water service pipe and the water outlet pipe until the water service pipe and the water outlet pipe are molded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010390082.0A CN111535157B (en) | 2020-05-11 | 2020-05-11 | High pier capable of reducing hydration heat of mass concrete and construction method thereof |
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| CN202010390082.0A CN111535157B (en) | 2020-05-11 | 2020-05-11 | High pier capable of reducing hydration heat of mass concrete and construction method thereof |
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| CN111535157B CN111535157B (en) | 2021-06-01 |
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| CN115324349A (en) * | 2022-06-24 | 2022-11-11 | 中国建筑第七工程局有限公司 | Construction method for mass concrete of linear accelerator |
| CN115450448A (en) * | 2022-09-06 | 2022-12-09 | 中铁十一局集团有限公司 | Mass concrete uniform heat dissipation device and construction method |
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Granted publication date: 20210601 |